Photodissociation Dynamics of Dichlorodifluoromethane (CF2Cl2) around 235 nm using Time-Sliced Velocity Map Imaging Technology

被引：2
|
作者：
Mao, Rui [1 ]
Xiao, Hong [1 ]
Hu, Yu [1 ]
Zhang, Qun [2 ,3 ]
Chen, Yang [2 ,3 ]
机构：
[1] Changzhou Inst Technol, Sch Math & Phys & Chem Engn, Changzhou 213032, Peoples R China
[2] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China
[3] Univ Sci & Technol China, Dept Chem Phys, Hefei 230026, Anhui, Peoples R China
来源：
CHINESE JOURNAL OF CHEMICAL PHYSICS | 2019年 / 32卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Dichlorodifluoromethane; Time-sliced velocity map imaging technology; Internal conversion; CHLOROFLUOROMETHANES; CHLOROFLUOROCARBONS; PHOTOLYSIS; ATOMS; CFCL3; CL;
D O I：
10.1063/1674-0068/cjcp1812283
中图分类号：
O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号：
070203 ; 070304 ; 081704 ; 1406 ;
摘要：
Photodissociation dynamics of dichlorodifluoromethane (CF2Cl2) around 235 nm has been studied using the time-sliced velocity map imaging technology in combination with the resonance enhanced multi-photon ionization technology. By measuring the raw images of chlorine atoms which are formed via one-photon dissociation of CF2Cl2, the speed and angular distributions can be directly obtained. The speed distribution of excited-state chlorine atoms consists of high translation energy (ET) and low ET components, which are related to direct dissociation on (3)Q(0) state and predissociation on the ground state induced by internal conversion, respectively. The speed distribution of ground-state chlorine atoms also consists of high ET and low ET components which are related to predissociation between (3)Q(0) and (1)Q(1) states and predissociation on the ground state induced by internal conversion, respectively. Radical dissociation channel is confirmed, nevertheless, secondary dissociation and three-body dissociation channels are excluded.
引用
收藏
页码：406 / 410
页数：5
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